Home / 81,129,115.52-111,996,785.28-54,352,552.28

Finding the Fourth Proportional to 81,129,115.52, 111,996,785.28 and 54,352,552.28

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Solution

The fourth proportional to 81,129,115.52, 111,996,785.28 and 54,352,552.28 is: 75,032,386.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129,115.52 : 111,996,785.28 = 54,352,552.28 : x
  2. Step 2: Convert to fraction form
    81,129,115.52/111,996,785.28 = 54,352,552.28/x
  3. Step 3: Cross multiply
    81,129,115.52x = 111,996,785.28 × 54,352,552.28
  4. Step 4: Simplify right side
    81,129,115.52x = 6,087,311,127,123,135
  5. Step 5: Solve for x
    x = 6,087,311,127,123,135/81,129,115.52
  6. Step 6: Final answer
    x = 75,032,386.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.